- Eliminated unnecessary calls to `misc.CodexInstructions` and corresponding checks in response processing.
- Streamlined instruction handling by directly updating "instructions" field from the original request payload.
- Simplified `gpt_5_instructions.txt` by removing redundancy and aligning scope with AGENTS.md standard instructions.
- Enhanced clarity and relevance of directives per Codex context.
- Added `CodexInstructions(modelName string)` function to dynamically select instructions based on the model (e.g., GPT-5 Codex).
- Introduced `gpt_5_instructions.txt` and `gpt_5_codex_instructions.txt` for respective model configurations.
- Updated translators to pass `modelName` and use the new instruction logic.
- Updated all `github.com/luispater/CLIProxyAPI/internal/...` imports to point to `github.com/luispater/CLIProxyAPI/v5/internal/...`.
- Adjusted `go.mod` to specify `module github.com/luispater/CLIProxyAPI/v5`.
